Hi there me again. The spell hit calculation of ECS may have changed with the latest ERA patch. I think talent ID's all changed. I think your addon was checking for spell hit talents. For example the mage Elemental Precision 3/3 talent in the frost tree gives 6% hit. The hit vs 63 mobs should show 1% miss change, not 7. It seems to be missing that 6% from the talent as mage. Root cause is prob a change in the talent ID.

Ouh, that could indeed be! Thanks for reporting this again, I'll take a look!